If I import the std.c libaries instead of including the libraries in C, would C code compile with a D compiler, or are there other backwords compatibility issues?
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If I import the std.c libaries instead of including the libraries in C, would C code compile with a D compiler, or are there other backwords compatibility issues?
There are several subtleties in D that can make C code not behave exactly as you may want it to. For instance, integer promotion rules are not quite the same (but almost), and initialization rules are different (floating point values — including arrays of such — are initialized to NaN, for example). Further, C function pointer syntax was deprecated recently, so you might have to translate some C type syntax to the equivalent D syntax.
In general, though, there is great focus on backwards compatibility, and most C code should compile fine (or with a very minor amount of changes) in D with the same semantics as in C.
Also note that
std.cis deprecated; please usecore.stdcinstead.